| Photo: Strauss/WireImage“Pleaaaase mosh to my song,” Katy Perry cooed shortly after taking the stage at Los Angeles’ Club Nokia on Sunday night. The pop princess was one of a dozen acts appearing as part of the Vans Warped Tour’s 15th anniversary celebration, which gathered several trek veterans, including NOFX, Bad Religion, Rise Against, All-American Rejects and Underoath, along with newcomers 3OH!3, Aggrolites and two all-star bands created just for the occasion (read: thrown together) for a |